Officer recalls CFMEU intimidation

A police officer says he was intimidated by a union organiser after being called to a Canberra worksite where the CFMEU was stopping a concrete pour.

Detective Sergeant Mark Battye told the royal commission on Tuesday that John Lomax swiped an entry permit card close to his face and then tried to "snatch" it out of his hand in December 2012.

Builder Darrell Leemhuis had told another hearing about how three union officials, including Mr Lomax, entered his Fyshwick site and blocked a concrete truck from pouring its load.

The concrete had to be dumped elsewhere, costing thousands of dollars.

The officer denied he approached Mr Lomax when he arrived on the site, instead saying the union organiser came into his personal space, which he defined as within a metre-and-a-half.

"I was concerned that if he was trying to intimidate police, I could only imagine he would probably use (greater) intimidation of any people on the site," Detective Sergeant Battye told the commission.

But he categorically denied he told Mr Lomax his name was familiar or that Mr Lomax had relatives that caused trouble.